Spark is Furore's public domain FHIR server build in C#.
Spark implements a major part of the FHIR specification and has been used and tested during the past HL7 WGM Connectathons. Furore and the community, will keep enhancing this server to support the latest versions and add functionality, but we welcome who wants to support this effort and help us make Spark a better reference platform and and playground for FHIR.
The source code of Spark in the branch dstu2/master we try to keep up-to-date with the DSTU-2 version of FHIR. Endpoint: http://spark-dstu2.furore.com/fhir
If you want to contribute, see our guidelines